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authorAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
committerAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
commitef2e26c91b80556af033d3335e55f5dfa6fff31d (patch)
treefaa21bfd7e7b5247250b47c7891dc1a5ebee6be9 /source4/smbd/negprot.c
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first public release of samba4 code
(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)
Diffstat (limited to 'source4/smbd/negprot.c')
-rw-r--r--source4/smbd/negprot.c526
1 files changed, 526 insertions, 0 deletions
diff --git a/source4/smbd/negprot.c b/source4/smbd/negprot.c
new file mode 100644
index 0000000000..caf3ce33b9
--- /dev/null
+++ b/source4/smbd/negprot.c
@@ -0,0 +1,526 @@
+/*
+ Unix SMB/CIFS implementation.
+ negprot reply code
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/* initialise the auth_context for this server and return the cryptkey */
+static void get_challenge(struct server_context *smb, char buff[8])
+{
+ NTSTATUS nt_status;
+ const uint8 *cryptkey;
+
+ /* muliple negprots are not premitted */
+ if (smb->negotiate.auth_context) {
+ DEBUG(3,("get challenge: is this a secondary negprot? auth_context is non-NULL!\n"));
+ smb_panic("secondary negprot");
+ }
+
+ DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
+
+ nt_status = make_auth_context_subsystem(&smb->negotiate.auth_context);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(0, ("make_auth_context_subsystem returned %s", nt_errstr(nt_status)));
+ smb_panic("cannot make_negprot_global_auth_context!\n");
+ }
+
+ DEBUG(10, ("get challenge: getting challenge\n"));
+ cryptkey = smb->negotiate.auth_context->get_ntlm_challenge(smb->negotiate.auth_context);
+ memcpy(buff, cryptkey, 8);
+}
+
+/****************************************************************************
+ Reply for the core protocol.
+****************************************************************************/
+static void reply_corep(struct request_context *req, uint16 choice)
+{
+ req_setup_reply(req, 1, 0);
+
+ SSVAL(req->out.vwv, VWV(0), choice);
+
+ req->smb->negotiate.protocol = PROTOCOL_CORE;
+
+ req_send_reply(req);
+}
+
+/****************************************************************************
+ Reply for the coreplus protocol.
+this is quite incomplete - we only fill in a small part of the reply, but as nobody uses
+this any more it probably doesn't matter
+****************************************************************************/
+static void reply_coreplus(struct request_context *req, uint16 choice)
+{
+ uint16 raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+
+ req_setup_reply(req, 13, 0);
+
+ /* Reply, SMBlockread, SMBwritelock supported. */
+ SCVAL(req->out.hdr,HDR_FLG,
+ CVAL(req->out.hdr, HDR_FLG) | FLAG_SUPPORT_LOCKREAD);
+
+ SSVAL(req->out.vwv, VWV(0), choice);
+ SSVAL(req->out.vwv, VWV(1), 0x1); /* user level security, don't encrypt */
+
+ /* tell redirector we support
+ readbraw and writebraw (possibly) */
+ SSVAL(req->out.vwv, VWV(5), raw);
+
+ req->smb->negotiate.protocol = PROTOCOL_COREPLUS;
+
+ req_send_reply(req);
+}
+
+/****************************************************************************
+ Reply for the lanman 1.0 protocol.
+****************************************************************************/
+static void reply_lanman1(struct request_context *req, uint16 choice)
+{
+ int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+ int secword=0;
+ time_t t = req->request_time.tv_sec;
+
+ req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
+
+ if (lp_security() != SEC_SHARE)
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+
+ if (req->smb->negotiate.encrypted_passwords)
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+
+ req->smb->negotiate.protocol = PROTOCOL_LANMAN1;
+
+ req_setup_reply(req, 13, req->smb->negotiate.encrypted_passwords ? 8 : 0);
+
+ /* SMBlockread, SMBwritelock supported. */
+ SCVAL(req->out.hdr,HDR_FLG,
+ CVAL(req->out.hdr, HDR_FLG) | FLAG_SUPPORT_LOCKREAD);
+
+ SSVAL(req->out.vwv, VWV(0), choice);
+ SSVAL(req->out.vwv, VWV(1), secword);
+ SSVAL(req->out.vwv, VWV(2), req->smb->negotiate.max_recv);
+ SSVAL(req->out.vwv, VWV(3), lp_maxmux());
+ SSVAL(req->out.vwv, VWV(4), 1);
+ SSVAL(req->out.vwv, VWV(5), raw);
+ SIVAL(req->out.vwv, VWV(6), req->smb->pid);
+ put_dos_date(req->out.vwv, VWV(8), t);
+ SSVAL(req->out.vwv, VWV(10), TimeDiff(t)/60);
+
+ /* Create a token value and add it to the outgoing packet. */
+ if (req->smb->negotiate.encrypted_passwords) {
+ SSVAL(req->out.vwv, VWV(11), 8);
+ get_challenge(req->smb, req->out.data);
+ }
+
+ req_send_reply(req);
+}
+
+/****************************************************************************
+ Reply for the lanman 2.0 protocol.
+****************************************************************************/
+static void reply_lanman2(struct request_context *req, uint16 choice)
+{
+ int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+ int secword=0;
+ time_t t = req->request_time.tv_sec;
+
+ req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
+
+ if (lp_security() != SEC_SHARE)
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+
+ if (req->smb->negotiate.encrypted_passwords)
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+
+ req->smb->negotiate.protocol = PROTOCOL_LANMAN2;
+
+ req_setup_reply(req, 13, 0);
+
+ SSVAL(req->out.vwv, VWV(0), choice);
+ SSVAL(req->out.vwv, VWV(1), secword);
+ SSVAL(req->out.vwv, VWV(2), req->smb->negotiate.max_recv);
+ SSVAL(req->out.vwv, VWV(3), lp_maxmux());
+ SSVAL(req->out.vwv, VWV(4), 1);
+ SSVAL(req->out.vwv, VWV(5), raw);
+ SIVAL(req->out.vwv, VWV(6), req->smb->pid);
+ put_dos_date(req->out.vwv, VWV(8), t);
+ SSVAL(req->out.vwv, VWV(10), TimeDiff(t)/60);
+
+ /* Create a token value and add it to the outgoing packet. */
+ if (req->smb->negotiate.encrypted_passwords) {
+ SSVAL(req->out.vwv, VWV(11), 8);
+ req_grow_data(req, 8);
+ get_challenge(req->smb, req->out.data);
+ }
+
+ req_push_str(req, NULL, lp_workgroup(), -1, STR_TERMINATE);
+
+ req_send_reply(req);
+}
+
+
+#if 0
+/****************************************************************************
+ Generate the spnego negprot reply blob. Return the number of bytes used.
+****************************************************************************/
+static DATA_BLOB negprot_spnego(struct server_context *smb)
+{
+ DATA_BLOB blob;
+ uint8 guid[16];
+ const char *OIDs_krb5[] = {OID_KERBEROS5,
+ OID_KERBEROS5_OLD,
+ OID_NTLMSSP,
+ NULL};
+ const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
+ char *principal;
+
+ smb->negotiate.spnego_negotiated = True;
+
+ memset(guid, 0, 16);
+ safe_strcpy((char *)guid, lp_netbios_name(), 16);
+ strlower((char *)guid);
+
+#if 0
+ /* strangely enough, NT does not send the single OID NTLMSSP when
+ not a ADS member, it sends no OIDs at all
+
+ we can't do this until we teach our sesssion setup parser to know
+ about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)
+ */
+ if (lp_security() != SEC_ADS) {
+ memcpy(p, guid, 16);
+ return 16;
+ }
+#endif
+ if (lp_security() != SEC_ADS) {
+ blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
+ } else {
+ asprintf(&principal, "%s$@%s", guid, lp_realm());
+ blob = spnego_gen_negTokenInit(guid, OIDs_krb5, principal);
+ free(principal);
+ }
+
+ return blob;
+}
+#endif
+
+/****************************************************************************
+ Reply for the nt protocol.
+****************************************************************************/
+static void reply_nt1(struct request_context *req, uint16 choice)
+{
+ /* dual names + lock_and_read + nt SMBs + remote API calls */
+ int capabilities;
+ int secword=0;
+ time_t t = req->request_time.tv_sec;
+ BOOL negotiate_spnego = False;
+
+ capabilities =
+ CAP_NT_FIND | CAP_LOCK_AND_READ |
+ CAP_LEVEL_II_OPLOCKS | CAP_NT_SMBS | CAP_RPC_REMOTE_APIS;
+
+ req->smb->negotiate.encrypted_passwords = lp_encrypted_passwords();
+
+ /* do spnego in user level security if the client
+ supports it and we can do encrypted passwords */
+
+ if (req->smb->negotiate.encrypted_passwords &&
+ (lp_security() != SEC_SHARE) &&
+ lp_use_spnego() &&
+ (req->flags2 & FLAGS2_EXTENDED_SECURITY)) {
+/* REWRITE negotiate_spnego = True;
+ capabilities |= CAP_EXTENDED_SECURITY;
+*/
+ }
+
+ if (lp_unix_extensions()) {
+ capabilities |= CAP_UNIX;
+ }
+
+ if (lp_large_readwrite() && (SMB_OFF_T_BITS == 64)) {
+ capabilities |= CAP_LARGE_READX | CAP_LARGE_WRITEX | CAP_W2K_SMBS;
+ }
+
+ if (SMB_OFF_T_BITS >= 64) {
+ capabilities |= CAP_LARGE_FILES;
+ }
+
+ if (lp_readraw() && lp_writeraw()) {
+ capabilities |= CAP_RAW_MODE;
+ }
+
+ /* allow for disabling unicode */
+ if (lp_unicode()) {
+ capabilities |= CAP_UNICODE;
+ }
+
+ if (lp_nt_status_support()) {
+ capabilities |= CAP_STATUS32;
+ }
+
+ if (lp_host_msdfs()) {
+ capabilities |= CAP_DFS;
+ }
+
+ if (lp_security() != SEC_SHARE) {
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+ }
+
+ if (req->smb->negotiate.encrypted_passwords) {
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+ }
+
+ req->smb->negotiate.protocol = PROTOCOL_NT1;
+
+ req_setup_reply(req, 17, 0);
+
+ SSVAL(req->out.vwv, VWV(0), choice);
+ SCVAL(req->out.vwv, VWV(1), secword);
+
+ /* notice the strange +1 on vwv here? That's because
+ this is the one and only SMB packet that is malformed in
+ the specification - all the command words after the secword
+ are offset by 1 byte */
+ SSVAL(req->out.vwv+1, VWV(1), lp_maxmux());
+ SSVAL(req->out.vwv+1, VWV(2), 1); /* num vcs */
+ SIVAL(req->out.vwv+1, VWV(3), req->smb->negotiate.max_recv);
+ SIVAL(req->out.vwv+1, VWV(5), 0x10000); /* raw size. full 64k */
+ SIVAL(req->out.vwv+1, VWV(7), req->smb->pid); /* session key */
+ SIVAL(req->out.vwv+1, VWV(9), capabilities);
+ put_long_date(req->out.vwv + VWV(11) + 1, t);
+ SSVALS(req->out.vwv+1,VWV(15), TimeDiff(t)/60);
+
+ if (!negotiate_spnego) {
+ /* Create a token value and add it to the outgoing packet. */
+ if (req->smb->negotiate.encrypted_passwords) {
+ req_grow_data(req, 8);
+ /* note that we do not send a challenge at all if
+ we are using plaintext */
+ get_challenge(req->smb, req->out.ptr);
+ req->out.ptr += 8;
+ SCVAL(req->out.vwv+1, VWV(16), 8);
+ }
+ req_push_str(req, NULL, lp_workgroup(), -1, STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
+ DEBUG(3,("not using SPNEGO\n"));
+ } else {
+#if 0
+ DATA_BLOB blob = negprot_spnego(req->smb);
+
+ req_grow_data(req, blob.length);
+ memcpy(req->out.ptr, blob.data, blob.length);
+ DEBUG(3,("using SPNEGO\n"));
+#else
+ exit_server(req->smb, "no SPNEGO please");
+#endif
+ }
+
+ req_send_reply(req);
+}
+
+/* these are the protocol lists used for auto architecture detection:
+
+WinNT 3.51:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [MICROSOFT NETWORKS 1.03]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+Win95:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [MICROSOFT NETWORKS 1.03]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+Win2K:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+OS/2:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [LANMAN1.0]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+*/
+
+/*
+ * Modified to recognize the architecture of the remote machine better.
+ *
+ * This appears to be the matrix of which protocol is used by which
+ * MS product.
+ Protocol WfWg Win95 WinNT Win2K OS/2
+ PC NETWORK PROGRAM 1.0 1 1 1 1 1
+ XENIX CORE 2 2
+ MICROSOFT NETWORKS 3.0 2 2
+ DOS LM1.2X002 3 3
+ MICROSOFT NETWORKS 1.03 3
+ DOS LANMAN2.1 4 4
+ LANMAN1.0 4 2 3
+ Windows for Workgroups 3.1a 5 5 5 3
+ LM1.2X002 6 4 4
+ LANMAN2.1 7 5 5
+ NT LM 0.12 6 8 6
+ *
+ * tim@fsg.com 09/29/95
+ * Win2K added by matty 17/7/99
+ */
+
+#define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
+#define ARCH_WIN95 0x2
+#define ARCH_WINNT 0x4
+#define ARCH_WIN2K 0xC /* Win2K is like NT */
+#define ARCH_OS2 0x14 /* Again OS/2 is like NT */
+#define ARCH_SAMBA 0x20
+
+#define ARCH_ALL 0x3F
+
+/* List of supported protocols, most desired first */
+static const struct {
+ const char *proto_name;
+ const char *short_name;
+ void (*proto_reply_fn)(struct request_context *req, uint16 choice);
+ int protocol_level;
+} supported_protocols[] = {
+ {"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
+ {"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
+ {"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
+ {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
+ {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
+ {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
+ {NULL,NULL,NULL,0},
+};
+
+/****************************************************************************
+ Reply to a negprot.
+****************************************************************************/
+
+void reply_negprot(struct request_context *req)
+{
+ int Index=0;
+ int choice = -1;
+ int protocol;
+ char *p;
+ int arch = ARCH_ALL;
+
+ if (req->smb->negotiate.done_negprot) {
+ exit_server(req->smb, "multiple negprot's are not permitted");
+ }
+ req->smb->negotiate.done_negprot = True;
+
+ p = req->in.data + 1;
+
+ while (p < req->in.data + req->in.data_size) {
+ Index++;
+ DEBUG(3,("Requested protocol [%s]\n",p));
+ if (strcmp(p,"Windows for Workgroups 3.1a") == 0)
+ arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
+ else if (strcmp(p,"DOS LM1.2X002") == 0)
+ arch &= ( ARCH_WFWG | ARCH_WIN95 );
+ else if (strcmp(p,"DOS LANMAN2.1") == 0)
+ arch &= ( ARCH_WFWG | ARCH_WIN95 );
+ else if (strcmp(p,"NT LM 0.12") == 0)
+ arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
+ else if (strcmp(p,"LANMAN2.1") == 0)
+ arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
+ else if (strcmp(p,"LM1.2X002") == 0)
+ arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
+ else if (strcmp(p,"MICROSOFT NETWORKS 1.03") == 0)
+ arch &= ARCH_WINNT;
+ else if (strcmp(p,"XENIX CORE") == 0)
+ arch &= ( ARCH_WINNT | ARCH_OS2 );
+ else if (strcmp(p,"Samba") == 0) {
+ arch = ARCH_SAMBA;
+ break;
+ }
+
+ p += strlen(p) + 2;
+ }
+
+ switch (arch) {
+ case ARCH_SAMBA:
+ set_remote_arch(req->smb, RA_SAMBA);
+ break;
+ case ARCH_WFWG:
+ set_remote_arch(req->smb, RA_WFWG);
+ break;
+ case ARCH_WIN95:
+ set_remote_arch(req->smb, RA_WIN95);
+ break;
+ case ARCH_WINNT:
+ if (req->flags2==FLAGS2_WIN2K_SIGNATURE)
+ set_remote_arch(req->smb, RA_WIN2K);
+ else
+ set_remote_arch(req->smb, RA_WINNT);
+ break;
+ case ARCH_WIN2K:
+ set_remote_arch(req->smb, RA_WIN2K);
+ break;
+ case ARCH_OS2:
+ set_remote_arch(req->smb, RA_OS2);
+ break;
+ default:
+ set_remote_arch(req->smb, RA_UNKNOWN);
+ break;
+ }
+
+ /* possibly reload - change of architecture */
+ reload_services(req->smb, True);
+
+ /* Check for protocols, most desirable first */
+ for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
+ p = req->in.data+1;
+ Index = 0;
+ if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
+ (supported_protocols[protocol].protocol_level >= lp_minprotocol()))
+ while (p < (req->in.data + req->in.data_size)) {
+ if (strequal(p,supported_protocols[protocol].proto_name))
+ choice = Index;
+ Index++;
+ p += strlen(p) + 2;
+ }
+ if(choice != -1)
+ break;
+ }
+
+ if(choice != -1) {
+ sub_set_remote_proto(supported_protocols[protocol].short_name);
+ reload_services(req->smb, True);
+ supported_protocols[protocol].proto_reply_fn(req, choice);
+ DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
+ } else {
+ DEBUG(0,("No protocol supported !\n"));
+ }
+
+ DEBUG(5,("negprot index=%d\n", choice));
+}